Shoe-dressing machine



Jan. 17, 1928. I

e. PASSE'FIUME SHOE DRESSING MACHINE Filed May 27. 1926 IN VEN TOR.

Giovanni P sefzume ATTORNEYS.

Patented Jan. 17, 1928.

UNITED STATES GIOVANNI PASSEFIUME,

or PORTLAND, cameos.

SHOE-DRESSING MACHINE."

Application filed May 27,

My invention relates to shoe machinery and has particularly to do withthe rotary tool referred to as a heel breaster, which is the tool usedto dress the concave surface of a heel and is frusto-conical in shape. y

' It is common practice at the. present time to fasten over saidfrusto-conical head a piece of sandpaper and to fasten the latter inplace by a threaded nut arranged to grip one portion thereof and gripthe same tightly against said head.

It is impractical to use a similarly formed cup-wheel made of emery orsimilar abrasive material for this purpose, because the leather 1!!ground away by said wheel soon fills up the interstices in said wheel,and forms a glazed surface thereon. Said. surface can only be renderedeffective again with great difiiculty and corresponding waste of time.

Sand paper or emery cloth on the other hand is easily torn and is wornout very quickly, the expense and loss of time entailed in the frequentreplacement of said sheets of abrasive material being a factor ofconsiderable im ortance.

The object o my invention therefore, is to provide an abrasiveattachment for rotary heads of this character by which the expense.trouble and loss of time incident to the frequent replacement ordressing of the active abrasive surface of such heads will be greatlyminimized.

I attain this object by providing a metallic plate formed as the segmentof a ring and 5 having thereon a plurality of upstanding,

cutting blades prefer: bly formed of struckup portions of said plates.The blades thus formed constitute abrasive or cutting surfaces whichwill last for a considerable period 40 without replacement, because wearmerely dresses theirrheight but maintains a sharp cutting edge thereon.For example, it is the usual practice to replace the strip of sand paperupon the wheel breaster every day or every other day, but metallicplates embodying in invention will serve effectively for severa months,without attention.

I am aware that machines of the type shown in Patent No. 1,054,656,granted 90 February 25, 1913 to Ronald F. McFeely, are

old in the art.

My invention is an improvement over the head shown in said patent in thefollowing particulars:

1. M improved metallic abrasive sheet is adapte to be fastened to arotary head by a 1926. serial No. 112,038.

single adjustable member, is simply and easily mounted and. dismounted,which factor is of considerableimportance especially when plates havingdifferently formed teeth are used upon the same for roughing andfinishing work. i

'2. The upstanding blades in myinvention are flat and will thus cutuniformly independently of their height, thus being substantiallyunaffected b wear.

3. The upstanding bla es in my invention are staggered and are arrangedto cover the entire length of the active surface of the head and thusthe shoe being dressed will not have to be moved to and fro, to preventthe formation of grooves'upon the surface being finished.

Further details and advantages of my invention are hereinafterbroughtout, and are described with reference to the accompanying drawings, inwhich:

Fig. 1 is a perspective view of a rotatably mounted head covered with anabrasive sheet embodying my invention;

Fig. 2 is a plan view of said sheet arranged flatwise; and

Fig. 3 is a longitudinal section thru said head and sheet showing themode of fastening the latter to the fori'ner.

My improved abrasive sheet a is formed to constitute an attachment to astandard frusto-oonical head I) commonlyprovided at one end of the maindriving shaft 0 of a shoe machine. Said head is fastened to said shaftat its end of lesser diameter and is coaxial therewith. Adjacent thepoint of juncture of said shaft 0 with said head 6, a nut 07 is mountedupon the threaded portion 0 of said driving shaft.

The nut (Z is arranged to clamp a sheet of abrasive material wrappedabout the head 5 to the latter. The sheet of abrasive material aembodying my invention is formed as a segment of a ring and is providedwith a series of substantially flat struck-up portions a forming blades.That is, said blades a are merely portions of the sheet a which havebeen severed upon one side and forced up cup-shaped to the remainder ofthe sheet upon the remaining three sides.

As can be noted in Fig. 2 said blades a extend radially to the center ofcurvature of said sheet and when the latter is rolled and wrapped aboutthe head, as shown in Fig. 1, extend substantially in longitudinalalinement with the axis of rotation of said head and the blade portionsa extend outwardly from the head at right angles and substantiallyradially to said axis.

As can be noted in Fig. 2, said blades a are formed in circular rows andthe blades in the adjacent rolls are staggered relatively, and overlapthe lines of termination of the blades in the adjacent rows so that theentire active length of the plate serves as an abrasive medium. That is,when the head is used to dress an article the blades cover substantiallythe entire active surface of the head so that the shoe being dressed mayremain stationary Without having grooves formed therein.

The portion of the plate of lesser radius,

as shown in Fig. 2, has a strip a which is unperforated, this being theportion of the plate gripped by the nut d, as shown in The head I) iscovered for the greater part With a layer of felt e and the abrasivesheet, which is relatively flexible, is thus permitted to give slightlyto conform to irregularities of the article being dressed thereby.

I claim: a

1. In a shoe dressing machine, the comsaid member having a plurality ofspaced upstanding blade-like projections constituting shearing bladesextending in a row across its face and in a series of rows, the bladesin each row being opposite to and overlapping the spaces between theblades in the preceding and succeeding rows.

2. An attachment for a shoe dressing machine, the latter comprising arotatable frusto-conical head, a driving shaftv co-axial therewith, andjoined to the face thereof of lesser diameter, and a threaded nutcarried by said shaft at its point of juncture With the head suchattachment consisting of a segmental ring-like plate member having aplurality of struck-up elongated cutting blades of substantially uniformheight, arranged in rows, the blades in each row being opposite to andoverlapping the spaces between the blades in the preceding andsucceeding rows and extending upon lines substantially radial to thecenter of curvature of the ring-like segmental member.

GIOVANNI PASSEFIUME.

